Removes tracegen (#1118)

Tracegen was a tool we used to use to populate zipkin when someone had
no instrumented apps. It would create a number of traces based on latin
words.

Since then, we have increasingly sophisticated and relevant self-tracing
setup, which in the java project extends all the way to cassandra.

Moreover, we have spigo, which now includes zipkin scripts to create
large amounts of realistic traces, and instrumentation-specific examples
from Brave and Sleuth.

Considering the better alternatives, we should stop maintaining tracegen

https://github.com/adrianco/spigo
https://github.com/openzipkin/brave-resteasy-example
https://github.com/spring-cloud-samples/brewery

README.md

@@ -34,16 +34,10 @@ Here's how to start zipkin using the default file-based backend and view traces.
 ```bash
 # get the zipkin source and change to its directory
 $ git clone https://github.com/openzipkin/zipkin; cd zipkin
-# start the query server in a new terminal session or tab
+# start the query server
 $ ./bin/query
-# start the collector server in a new terminal session or tab
-$ ./bin/collector
-# start the web server in a new terminal session or tab
-$ ./bin/web
-# create dummy traces
-$ ./bin/tracegen
-# open the ui and look at them!
-$ open http://localhost:8080/
+$ open http://localhost:9411/
+# While you browse, self-tracing will populate traces for you to view
 ```
 
 ## Full documentation

gradle.properties

@@ -23,10 +23,6 @@ org.gradle.jvmargs=-XX\:+UseConcMarkSweepGC -Xms2G -Xmx2G -Xss512k
 # Other values include, but aren't limited to "cassandra"
 configKey=dev
 
-# tracegenDest allows you to generate traces to something besides localhost.
-# Ex. `bin/tracegen 192.168.99.100` for Docker Machine.
-tracegenDest=localhost
-
 # dbEngine applies to zipkin-(collector|query)-service when config == dev
 #
 # dbEngine names ending in "-persistent" need to share db files. Since these

settings.gradle

@@ -58,7 +58,4 @@ def includes = [
 'zipkin-sampler'
 ]
 
-if (System.getenv('PUBLISHING') == null) {
-    includes.add('zipkin-tracegen')
-}
 include includes.toArray(new String[0])